package com.yaodian100.mall.member.web;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import javax.imageio.ImageIO;

public class ValidateCode {
	private int width = 90; // 图片的宽度。
	private int height = 20; // 图片的高度。
	private int codeCount = 6; // 验证码字符个数
	private int lineCount = 30; // 验证码干扰线数
	private String code = null; // 验证码
	private BufferedImage buffImg = null; // 验证码图片Buffer
	private char[] codeSequence = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };

	public ValidateCode() {
		this.createCode();
	}

	/**
	 * 
	 * @param width 图片宽
	 * @param height 图片高
	 */
	public ValidateCode(int width, int height) {
		this.width = width;
		this.height = height;
		this.createCode();
	}

	/**
	 * 
	 * @param width 图片宽
	 * @param height 图片高
	 * @param codeCount 字符个数
	 * @param lineCount 干扰线条数
	 */
	public ValidateCode(int width, int height, int codeCount, int lineCount) {
		this.width = width;
		this.height = height;
		this.codeCount = codeCount;
		this.lineCount = lineCount;
		this.createCode();
	}

	public Color getRandColor(int fcolor, int bcolor) {
		Random random = new Random();
		if (fcolor > 255) {
			fcolor = 255;
		}
		if (bcolor > 255) {
			bcolor = 255;
		}
		int r = fcolor + random.nextInt(bcolor - fcolor);
		int g = fcolor + random.nextInt(bcolor - fcolor);
		int b = fcolor + random.nextInt(bcolor - fcolor);
		return new Color(r, g, b);
	}

	public void createCode() {
		int x = 0, fontHeight = 0, codeY = 0;
		int red = 0, green = 0, blue = 0;

		x = width / (codeCount + 2);// 每个字符的宽度
		fontHeight = height - 2;// 字体的高度
		codeY = height - 4;

		// 图像buffer
		buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		Graphics2D g = buffImg.createGraphics();
		// 生成随机数
		Random random = new Random();

		// 隨機產生背景圖
		g.setColor(getRandColor(200, 250));
		g.fillRect(0, 0, width, height);
		// g.setFont(new Font("Times New Roman", Font.PLAIN, 32));// 创建字体
		g.setColor(getRandColor(160, 200));

		List<Font> fontlist = new ArrayList<Font>();
		fontlist.add(new Font("Times New Roman", Font.PLAIN, 32));
		fontlist.add(new Font("Times New Roman", Font.ITALIC, 32));
		fontlist.add(new Font("Times New Roman", Font.BOLD, 32));
		for (int i = 0; i < lineCount; i++) {
			int xs = random.nextInt(width);
			int ys = random.nextInt(height);
			int xe = xs + random.nextInt(width / 8);
			int ye = ys + random.nextInt(height / 8);
			red = random.nextInt(255);
			green = random.nextInt(255);
			blue = random.nextInt(255);
			g.setColor(new Color(red, green, blue));
			g.drawLine(xs, ys, xe, ye);
		}
		System.out.println("codeY:" + codeY);
		// randomCode记录随机产生的验证码
		StringBuffer randomCode = new StringBuffer();
		// 文字变形设置
		AffineTransform fontAT = new AffineTransform();
		// 随机产生codeCount个字符的验证码。
		for (int i = 0; i < codeCount; i++) {
			String strRand = String.valueOf(codeSequence[random.nextInt(codeSequence.length)]);
			// 产生随机的颜色值，让输出的每个字符的颜色值都将不同。
			red = random.nextInt(255);
			green = random.nextInt(255);
			blue = random.nextInt(255);
			g.setColor(new Color(red, green, blue));

			int rotate = random.nextInt(20);
			fontAT.rotate(random.nextBoolean() ? Math.toRadians(rotate) : -Math.toRadians(rotate / 2));
			Font fx = new Font(new String[] { "Times New Roman", "Arial" }[random.nextInt(1)], random.nextInt(5), 32)
					.deriveFont(fontAT);

			// g.setFont(fontlist.get(random.nextInt(2)));
			g.setFont(fx);
			int xpos = (i + 1) * x;
			//
			// int ypos = random.nextInt(codeY / 2 + 10);
			int ypos = (int) (Math.random() * (codeY - 20 + 1)) + 25;
			System.out.println(ypos);
			g.drawString(strRand, xpos, ypos);
			// 将产生的N个随机数组合在一起。
			randomCode.append(strRand);
		}
		// 将N位数字的验证码保存到Session中。
		code = randomCode.toString();
	}

	public void write(String path) throws IOException {
		OutputStream sos = new FileOutputStream(path);
		this.write(sos);
	}

	public void write(OutputStream sos) throws IOException {
		ImageIO.write(buffImg, "png", sos);
		sos.close();
	}

	public BufferedImage getBuffImg() {
		return buffImg;
	}

	public String getCode() {
		return code;
	}
}